Model 105/3 was the first Reference Series loudspeaker to incorporate Uni-Q technology. It was a four-way system, employing six drive units, with very high sensitivity, high output capability and outstanding power handling capacity.

Several design features of the 105/3 were directly derived from the acclaimed Model 104/2. Bass reproduction was handled by development of the 104/2’s coupled cavity system, and the separate midrange enclosure module was also retained and developed – this time to incorporate two dedicated lower midrange drive units and the new Uni-Q upper midrange/tweeter driver array.
Consistent with other the Reference Series loudspeakers, Model 105/3 included conjugate load matching to improve the amplifier-speaker interface and performance was enhanced with the use of the KUBE 200 active equaliser. In the case of Model 105/3 and the Reference Series systems that followed, the use of the matching KUBE was not essential, the loudspeakers were optimised to function in standard passive configuration.

The addition of Uni-Q coincident source technology allowed a major improvement in directivity control, in particular, the removal of the constrained vertical directivity of convention loudspeakers caused by the vertically separated midrange and high frequency drive units.